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发明名称
Sand preparation
摘要
申请公布号
US1879272(A)
申请公布日期
1932.09.27
申请号
US19310517636
申请日期
1931.02.21
申请人
FOUNDRY MATERIALS, INC.
发明人
INKLEY EDWIN A.
分类号
B22C1/18
主分类号
B22C1/18
代理机构
代理人
主权项
地址
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